CSI Divisions - Cost data
- 23 00 00 - Heating, Ventilating, and Air Conditioning (HVAC)
- 23 10 00 - Facility Fuel Systems
- 23 20 00 - HVAC Piping and Pumps
- 23 30 00 - HVAC Air Distribution
- 23 40 00 - HVAC Air Cleaning Devices
- 23 50 00 - Central Heating Equipment
- 23 60 00 - Central Cooling Equipment
- 23 70 00 - Central HVAC Equipment
- 23 80 00 - Decentralized HVAC Equipment